/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.hive;

import org.apache.iotdb.tsfile.file.metadata.enums.CompressionType;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.file.metadata.enums.TSEncoding;
import org.apache.iotdb.tsfile.read.TsFileSequenceReader;
import org.apache.iotdb.tsfile.read.common.Path;
import org.apache.iotdb.tsfile.write.TsFileWriter;
import org.apache.iotdb.tsfile.write.record.Tablet;
import org.apache.iotdb.tsfile.write.schema.MeasurementSchema;
import org.apache.iotdb.tsfile.write.schema.Schema;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class TsFileTestHelper {

    private static final Logger logger = LoggerFactory.getLogger(TsFileTestHelper.class);

    public static boolean deleteTsFile(String filePath) {
        File file = new File(filePath);
        return file.delete();
    }

    public static void writeTsFile(String filePath) {

        try {
            File file = new File(filePath);

            if (file.exists()) {
                file.delete();
            }

            Schema schema = new Schema();
            List<MeasurementSchema> schemaList = new ArrayList<>();

            // the number of rows to include in the tablet
            int rowNum = 1000000;
            // the number of values to include in the tablet
            int sensorNum = 10;

            // add measurements into file schema (all with INT64 data type)
            for (int i = 0; i < sensorNum; i++) {
                MeasurementSchema measurementSchema =
                        new MeasurementSchema(
                                "sensor_" + (i + 1),
                                TSDataType.INT64,
                                TSEncoding.TS_2DIFF,
                                CompressionType.UNCOMPRESSED);
                schema.registerTimeseries(new Path("device_1"), measurementSchema);
                schemaList.add(measurementSchema);
            }

            // add measurements into TSFileWriter
            TsFileWriter tsFileWriter = new TsFileWriter(file, schema);

            // construct the tablet
            Tablet tablet = new Tablet("device_1", schemaList);

            long[] timestamps = tablet.timestamps;
            Object[] values = tablet.values;

            long timestamp = 1;
            long value = 1000000L;

            for (int r = 0; r < rowNum; r++, value++) {
                int row = tablet.rowSize++;
                timestamps[row] = timestamp++;
                for (int i = 0; i < sensorNum; i++) {
                    long[] sensor = (long[]) values[i];
                    sensor[row] = value;
                }
                // write Tablet to TsFile
                if (tablet.rowSize == tablet.getMaxRowNumber()) {
                    tsFileWriter.write(tablet);
                    tablet.reset();
                }
            }
            // write Tablet to TsFile
            if (tablet.rowSize != 0) {
                tsFileWriter.write(tablet);
                tablet.reset();
            }

            // close TsFile
            tsFileWriter.close();
        } catch (Throwable e) {
            e.printStackTrace();
            System.out.println(e.getMessage());
        }
    }

    public static void main(String[] args) throws IOException {
        String filePath = "test.tsfile";
        File file = new File(filePath);
        if (file.exists()) {
            file.delete();
        }
        writeTsFile(filePath);
        TsFileSequenceReader reader = new TsFileSequenceReader(filePath);
        logger.info("Get file meta data: {}", reader.readFileMetadata());
        reader.close();
    }
}
